Class: SC::Builder::ModuleInfo

Inherits:
Base show all
Defined in:
lib/sproutcore/builders/module.rb

Overview

Builds a module_info.js file which MUST be run before the framework is loaded by the application or framework doing the loading.

Instance Attribute Summary

Attributes inherited from Base

#entry

Instance Method Summary collapse

Methods inherited from Base

build, #initialize, #joinlines, #read, #readlines, #replace_static_url, #sc_static_match, #static_url, #writeline, #writelinebinary, #writelines

Constructor Details

This class inherits a constructor from SC::Builder::Base

Instance Method Details

#build(dst_path) ⇒ Object 



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# File 'lib/sproutcore/builders/module.rb', line 16

def build(dst_path)
  begin
    require 'erubis'
  rescue
    raise "Cannot render module_info.js because erubis is not installed. Try running 'sudo gem install erubis' and try again."
  end

  eruby = Erubis::Eruby.new <<-EOT
    ;(function() {
      var target_name = '<%= @target_name %>' ;
      if (!SC.MODULE_INFO) throw "SC.MODULE_INFO is not defined!" ;
      if (SC.MODULE_INFO[target_name]) return ; <%# not an error... %>

      <%# first time, so add a Hash with this target's module_info %>
      SC.MODULE_INFO[target_name] = SC.Object.create({
        dependencies:[<%= @dependencies.join(',') %>],
        styles:[<%= @styles.join(',') %>],
        styles2x: [<%= @styles2x.join(',') %>],
        scriptURL:'<%= @script %>',
        stringURL:'<%= @string %>'<% if @prefetched %>,
        isPrefetched: YES
        <% end %><% if @inlined %>,
        isLoaded: YES,
        source: <%= @source %>
        <% end %><% if @css_source %>,
        cssSource: <%= @css_source %>
        <% end %><% if @css_2x_source %>,
        css2xSource: <%= @css_2x_source %>
        <% end %>
      })
    })();
  EOT

  output = ""

  entry.targets.each do |t|
    next unless t[:target_type] == :module

    manifest = t.manifest_for(entry.manifest.variation)

    script_entry = manifest.find_entry('javascript.js')
    next if not script_entry
    script_url = script_entry.cacheable_url

    string_entry = manifest.find_entry('javascript-strings.js')
    next if not string_entry
    string_url = string_entry.cacheable_url

    module_info = t.module_info({ :variation => entry[:variation] })

    # Handle inlined modules. Inlined modules get included as strings
    # in the module info.
    source = nil, css_source = nil, css_2x_source = nil

    # if (and only if) the module is inlined, we must include the source
    # for the JS AND CSS inline as well (as strings)
    if t[:inlined_module]
      source = File.read(script_entry.stage![:staging_path]).to_json

      css_entry = manifest.find_entry('stylesheet.css')
      if css_entry
        css_path = css_entry.stage![:staging_path]

        # We must check if the file exists because there are cases where we can have
        # an entry but no file: no file is added if the file is empty, but the file
        # could be empty if all input files are empty or full of comments.
        css_source = File.read(css_path).to_json if File.exist? css_path
      end

      css_2x_entry = manifest.find_entry('[email protected]')
      if css_2x_entry
        css_2x_path = css_2x_entry.stage![:staging_path]
        css_2x_source = File.read(css_2x_path).to_json if File.exist? css_2x_path
      end
    end

    output << eruby.evaluate({
      :target_name => t[:target_name].to_s.sub(/^\//,''),
      :dependencies    => module_info[:requires].map{ |t| "'#{t[:target_name].to_s.sub(/^\//,'')}'" },
      :styles      => module_info[:css_urls].map{ |url| "'#{url}'" },
      :styles2x    => module_info[:css_2x_urls].map {|url| "'#{url}'"},
      :script      => script_url,
      :string      => string_url,
      :source      => source,
      :inlined     => t[:inlined_module],
      :prefetched  => t[:prefetched_module],
      :css_source  => css_source,
      :css_2x_source => css_2x_source
    })
  end
  writelines dst_path, [output]
end